BD87A41FVM-TR Rohm Semiconductor, BD87A41FVM-TR Datasheet
BD87A41FVM-TR
Specifications of BD87A41FVM-TR
Available stocks
Related parts for BD87A41FVM-TR
BD87A41FVM-TR Summary of contents
Page 1
... BD87A34FVM，BD87A41FVM，BD99A41F Description The BD37A19FVM,BD37A41FVM,BD87A28FVM,BD87A29FVM,BD87A34FVM,BD87A41FVM,BD99A41F is a watchdog timer reset IC. It delivers a high precision detection voltage of ±1.5% and a super-low current consumption of 5 µA (Typ.). It can be used in a wide range of electronic devices to monitor power supply voltages and in system operation to prevent runaway operation. ...
Page 2
Parameter RESET power supply voltage WDT power supply voltage ●Electrical characteristics (Unless otherwise specified −40°C to 105°C, VDD = 5 V) Parameter [Overall] Total supply current 1 (during WDT operation) ...
Page 3
Ta = 25°C) : 4.1V Detection SUPPLY VOLTAGE: VDD [V] Fig. 1 Detection Voltage 2 1.5 1 0 ...
Page 4
BD37A□□FVM VDD CLK Vref CT 2 VDD Pulse generation + circuit CTW 3 + VthH VthL VDD 4 ●Pin assignments BD37A□□FVM Pin No. Function name 1 CLK Clock input from microcontroller 2 CT ...
Page 5
Circuit diagram CT VDD CLK CTW VDD VDD CTW ●Timing chart VDD INH (BD37A□□FVM／BD99A41F) INH (BD87A□□FVM) CLK VCT VCTH VCTW RESET ●Explanation (1) The RESET pin voltage (RESET) switches to low when the power supply voltage (VDD) falls to ...
Page 6
The CTW pin state switches from charge to discharge when VCTW reaches VthL, and RESET switches from low to high. The watchdog timer reset time TWL is given by the following equation: TWL (s) ≈ (0.5 × CTW (µF))/(ICTWO) ...
Page 7
Actions in strong electromagnetic field Use caution when using the IC in the presence of a strong electromagnetic field as doing so may cause the IC to malfunction. 6. Testing on application boards When testing the ...
Page 8
ROHM model Part number name 37A: H Active 87A: L Active 99A: H Active MSOP8 <Dimension> 2.9 ± 0 +0.05 0.145 0.475 −0.03 +0.05 0.22 ...
Page 9
Appendix No technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of ROHM CO.,LTD. The contents described herein are subject to change without notice. The specifications for the product ...